List of Hot 100 number-one singles of 2018 (Japan)
# List of Hot 100 number-one singles of 2018 (Japan)

The following is a list of number-one singles on the Billboard Japan Hot 100 chart in 2018.

## Chart history

| Issue date | Song | Artist(s) |
| - | - | - |
| January 1 | "White Love" | Hey! Say! JUMP |
| January 8 | "Warota People" | NMB48 |
| January 15 | "Hero" | Namie Amuro |
| January 22 | "Muishiki no Iro" | SKE48 |
| January 29 | "LPS" | NEWS |
| February 5 | "Topaz Love" | KinKi Kids |
| February 12 | "Kurayami" | STU48 |
| February 19 | "Candy Pop" | Twice |
| February 26 | "Mae o Muke" | Hey! Say! JUMP |
| March 5 | "Find the Answer" | Arashi |
| March 12 | "Doraemon" | Gen Hoshino |
| March 19 | "Glass o Ware!" | Keyakizaka46 |
| March 26 | "Jabaja" | AKB48 |
| April 2 | "Lemon" | Kenshi Yonezu |
| April 9 | "Lemon" | Kenshi Yonezu |
| April 16 | "Yokubomono" | NMB48 |
| April 23 | "Haru wa Doko kara Kuru no ka?" | NGT48 |
| April 30 | "Ask Yourself" | KAT-TUN |
| May 7 | "Synchronicity" | Nogizaka46 |
| May 14 | "Hayaokuri Calendar" | HKT48 |
| May 21 | "Shinkarion" | Boys and Men |
| May 28 | "Wake Me Up" | Twice |
| June 4 | "Cinderella Girl" | King & Prince |
| June 11 | "Teacher Teacher" | AKB48 |
| June 18 | "Innocent Days" | Sexy Zone |
| June 25 | "Are You Happy?" | Morning Musume '18 |
| July 2 | "The New Era" | Got7 |
| July 9 | "Blue" | NEWS |
| July 16 | "Ikinari Punch Line" | SKE48 |
| July 23 | "Love" | Kis-My-Ft2 |
| July 30 | "Gyakuten Lovers" | Ken Tackey |
| August 6 | "Natsu Hayate" | Arashi |
| August 13 | "Cosmic Human" | Hey! Say! JUMP |
| August 20 | "Jikochū de Ikō!" | Nogizaka46 |
| August 27 | "Ambivalent" | Keyakizaka46 |
| September 3 | "Idea" | Gen Hoshino |
| September 10 | "Idea" | Gen Hoshino |
| September 17 | "Koko ni" | Kanjani Eight |
| September 24 | "Ikiro" | NEWS |
| October 1 | "Sentimental Train" | AKB48 |
| October 8 | "Yeah Yeah Yeah" | Hello! Project All Stars |
| October 15 | "Kimi, Boku" | Kis-My-Ft2 |
| October 22 | "Memorial" | King & Prince |
| October 29 | "Boku Datte Naichau yo" | NMB48 |
| November 5 | "Kimi no Uta" | Arashi |
| November 12 | "Flamingo" | Kenshi Yonezu |
| November 19 | "Fake Love" | BTS |
| November 26 | "Kaerimichi wa Tōmawari Shitaku Naru" | Nogizaka46 |
| December 3 | "Old Fashion" | Back Number |
| December 10 | "No Way Man" | AKB48 |
| December 17 | "Karakuri Darake no Tenderness" | Sexy Zone |
| December 24 | "Stand by You" | SKE48 |
| December 31 | "Aitai, Aitai, Aenai" | KinKi Kids |
